Comment 6 for bug 31036

Marc: Firstly, vga=normal is now an exception; it is intentionally no longer copied by request of the laptop team, since it's too easy to select in the graphical boot menu and it breaks suspend/resume.

However, this change was made well after Flight CD 6, so it's not your problem. Your problem is almost certainly that you added vga=normal to the wrong place in /boot/grub/menu.lst. Please read the comments in that file carefully to find out where to add it in order to have it preserved on upgrade.